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Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Revenue, Percentage | 100.00% | 100.00%
Revenue | $ 15,982,438 | $ 18,273,442
Reportable Geographical Components [Member] | Americas [Member] |  |
Revenue, Percentage | 7.00% | 17.00%
Revenue | $ 1,073,433 | $ 3,121,797
Reportable Geographical Components [Member] | Asia Pacific [Member] |  |
Revenue, Percentage | 21.00% | 25.00%
Revenue | $ 3,406,420 | $ 4,658,070
Reportable Geographical Components [Member] | Europe [Member] |  |
Revenue, Percentage | 59.00% | 58.00%
Revenue | $ 9,379,337 | $ 10,493,575
Reportable Geographical Components [Member] | Middle East and Africa [Member] |  |
Revenue, Percentage | 13.00% | 0.00%
Revenue | $ 2,123,248 | $ 0

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